Liability Paid Once, Posted Twice in Register???

I'm here to help you fix the duplicate payment, lmc_1026.

You can try to delete the payment to see if it will still show up in the list. If so, possibly it's corrupt data. You can run the Verify/Rebuild utility to detect the data damage.

Here's how: 

1. Click File.
2. Go to Utilities, then choose Verify Data.
3. If QuickBooks detected no problems, there's no further action needed. If you receive a message, "Your data has lost integrity," the file is damaged. Just continue to Rebuild Data to correct the problem.
4. When you Rebuild Data, you'll receive a message to back up your company file, just click OK. The utility starts as soon as the back up is finished.
5. Click OK when you get the message "Rebuild has completed."
6. Run Verify Data again to check for remaining data damage.

Once done, you can try deleting again the payment. Then, check if it will still show up the duplicate transaction.

If you still encounter the same issue, you can perform resort lists in QuickBooks. Make sure to follow the steps in the Re-sort chart of accounts.

You can also review and match bank transactions in QuickBooks Desktop. Please visit this article for your reference: Add And Match Bank Feed Transactions In QuickBooks Desktop.

Feel free to let us know if you still encounter issues with your Liability payment. I'll always be around to help you anytime.